Enhanced Test Cases

class TestCase(unittest.TestCase):
    """
    Enhanced test case extending unittest.TestCase.
    
    Provides additional assertion methods, content attachments,
    and improved error reporting for comprehensive testing.
    """
    
    def assertThat(self, matchee, matcher, message='', verbose=False):
        """
        Assert that matchee matches the given matcher.
        
        Args:
            matchee: Object to be matched
            matcher: Matcher instance to apply
            message (str): Optional failure message
            verbose (bool): Include detailed mismatch info
            
        Raises:
            MismatchError: If matcher does not match matchee
        """
    
    def expectThat(self, matchee, matcher):
        """
        Check expectation without failing immediately.
        
        Allows multiple expectations to be checked, with failures
        reported at test completion.
        
        Args:
            matchee: Object to be matched  
            matcher: Matcher instance to apply
        """
    
    def addDetail(self, name, content_object):
        """
        Add debugging detail to test result.
        
        Args:
            name (str): Detail identifier
            content_object (Content): Content to attach
        """
    
    def getDetails(self):
        """
        Get all attached details.
        
        Returns:
            dict: Mapping of detail names to Content objects
        """
    
    def patch(self, obj, attribute, new_value):
        """
        Apply a patch for the duration of the test.
        
        Args:
            obj: Object to patch
            attribute (str): Attribute name to patch
            new_value: New value for attribute
        """
    
    def useFixture(self, fixture):
        """
        Use a fixture for the test's duration.
        
        Args:
            fixture: Fixture instance with setUp/cleanUp methods
            
        Returns:
            The fixture instance
        """

class PlaceHolder(TestCase):
    """
    Placeholder for tests not yet implemented.
    
    Useful for creating test structure before implementation.
    """
    
    def __init__(self, test_id, short_description=None, details=None, outcome='addSuccess'):
        """
        Create a placeholder test.
        
        Args:
            test_id (str): Unique test identifier
            short_description (str): Brief test description
            details (dict): Additional test details  
            outcome (str): Expected test outcome
        """

class ErrorHolder(PlaceHolder):
    """
    Placeholder for tests that failed to load.
    
    Represents tests that couldn't be imported or constructed
    due to errors in the test definition.
    """
    
    def __init__(self, test_id, error, short_description=None, details=None):
        """
        Create an error holder for a failed test.
        
        Args:
            test_id (str): Test identifier that failed
            error: Exception that prevented test loading
            short_description (str): Brief error description
            details (dict): Error details
        """

def skip(reason):
    """
    Skip test unconditionally.
    
    Args:
        reason (str): Reason for skipping
        
    Returns:
        Test decorator function
    """

def skipIf(condition, reason):
    """
    Skip test if condition is true.
    
    Args:
        condition: Boolean condition to evaluate
        reason (str): Reason for skipping
        
    Returns:
        Test decorator function
    """

def skipUnless(condition, reason):
    """
    Skip test unless condition is true.
    
    Args:
        condition: Boolean condition to evaluate  
        reason (str): Reason for skipping
        
    Returns:
        Test decorator function
    """

class ExpectedException:
    """
    Context manager for expected exceptions.
    
    More flexible than unittest's assertRaises with support
    for matcher-based exception validation.
    """
    
    def __init__(self, matcher_or_exception, msg=None):
        """
        Create expected exception context.
        
        Args:
            matcher_or_exception: Exception class or matcher
            msg (str): Optional failure message
        """
    
    def __enter__(self):
        """Enter context manager."""
        return self
    
    def __exit__(self, exc_type, exc_value, traceback):
        """
        Exit context manager and validate exception.
        
        Returns:
            bool: True if exception was expected and handled
        """

def clone_test_with_new_id(test, new_id):
    """
    Clone a test with a new test ID.
    
    Args:
        test: Original test case instance
        new_id (str): New test identifier
        
    Returns:
        TestCase: Cloned test with new ID
    """

def run_test_with(test_runner):
    """
    Decorator to specify custom test runner.
    
    Args:
        test_runner: RunTest class or instance
        
    Returns:
        Test method decorator
    """

def unique_text_generator():
    """
    Generate unique text strings.
    
    Yields:
        str: Unique text strings for test isolation
    """

import testtools
from testtools.matchers import Equals, Contains, GreaterThan

class MyEnhancedTest(testtools.TestCase):
    
    def test_matcher_assertions(self):
        # Use matchers for sophisticated assertions
        self.assertThat("Hello World", Contains("World"))
        self.assertThat(42, GreaterThan(40))
        self.assertThat([1, 2, 3], MatchesListwise([
            Equals(1), Equals(2), Equals(3)
        ]))
    
    def test_with_debug_content(self):
        # Attach debugging information
        debug_data = {"state": "processing", "count": 42}
        self.addDetail('debug_state', 
                      testtools.content.json_content(debug_data))
        
        # Test continues normally
        result = process_data()
        self.assertThat(result, Contains("success"))
    
    def test_expected_exception(self):
        # Test expected exceptions with matchers
        with testtools.ExpectedException(
            MatchesException(ValueError, "Invalid.*input")
        ):
            process_invalid_input()
    
    @testtools.skip("Feature not implemented")
    def test_future_feature(self):
        pass
        
    @testtools.skipIf(os.name == 'nt', "Unix-only test")
    def test_unix_feature(self):
        # Test Unix-specific functionality
        pass

import testtools
from fixtures import TempDir

class MyFixtureTest(testtools.TestCase):
    
    def test_with_temp_directory(self):
        # Use fixture for temporary directory
        temp_dir = self.useFixture(TempDir())
        
        # Write test file
        test_file = os.path.join(temp_dir.path, 'test.txt')
        with open(test_file, 'w') as f:
            f.write('test content')
            
        # Test file operations
        self.assertTrue(os.path.exists(test_file))
        # Fixture automatically cleaned up

class MyExpectationTest(testtools.TestCase):
    
    def test_multiple_expectations(self):
        # Check multiple expectations without immediate failure
        data = get_complex_data()
        
        self.expectThat(data['status'], Equals('success'))
        self.expectThat(data['count'], GreaterThan(0))
        self.expectThat(data['items'], HasLength(5))
        
        # All expectations checked, failures reported together